<template>
    <div class="nav-bar">
        <div class="left" @click="goBack">
            <slot name="left">
                <i class="el-icon-arrow-left"></i>
            </slot>
        </div>
        <div class="center"><slot ></slot></div>
        <div class="right"><slot name="right"></slot></div>
        
    </div>
</template>

<script>
import { reactive, toRefs } from 'vue'
import { useRouter } from 'vue-router'
export default {
    setup () {
        const state = reactive({
            count: 0
        })
        const router =useRouter()
        const goBack = () => {
            router.go(-1)
        }
        return {
            ...toRefs(state),
            goBack
        }
    }
}
</script>

<style lang="scss" scoped>
.nav-bar{
    background-color: #42b983 ;
    color:#ffffff;
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    z-index: 9;
    height: 45px;
    line-height: 45px;
    box-shadow: 0 5px 5px rgba(100, 100, 100 , 0.2);
    display: flex;
    .left,.right{
        width: 60px;
    }
    .center{
        flex:1;
    }
}

</style>